Indian Rivers and Waterways

The Godavari is the longest among these rivers at approximately 1,465 km. It originates in Trimbakeshwar, Maharashtra, and flows through multiple states before draining into the Bay of Bengal. The Krishna is about 1,400 km, Narmada is 1,312 km, and the Yamuna is approximately 1,376 km. The Godavari is often called the 'Dakshina Ganga' (Ganges of the South).

The Pong Dam is indeed constructed on the Beas River in Himachal Pradesh, India. It's one of the highest earthfill dams and creates the Gobind Sagar Lake. The dam is used for hydroelectric power generation and irrigation, making it a significant infrastructure project in the region.

Amarkantak region is a unique natural heritage area and is the meeting point of the Vindhyas and the Satpuras, with the Maikal Hills being the fulcrum. This is where the Narmada River, the Son River and Johila River emerge. (Hence, option '3' is correct). The Tapi River originates in the Betul district from a place called Multai. 

Nagarjuna Sagar is one of India's largest dams, built across the Krishna River between Nalgonda and Guntur districts in Telangana and Andhra Pradesh. It is a major multipurpose project providing irrigation and hydroelectric power.

Kayals are the shallow lagoons and backwaters along the west coast of India. Seasonal streams that flow through the Shiwaliks are called Chos.

Kara Kum is a desert in Central Asia (literally,'black sands'). Panj River is a tributary of Oxus. Kyzyl-Suu is another name for Vakhsh river, another tributary of Oxus.

With a length of 1465 km, river Godavari is the second longest river in India, second only to river Ganges, and the longest in southern India. For this, it is also known as “Dakshin Ganga”.

The Indira Gandhi Canal (Rajasthan Canal) draws its water from the Sutlej River via the Harike barrage, along with water from the Beas River. This is correct. The canal brings water to the arid regions of Rajasthan. Options like Chambal and Jhajjar are tributaries but not the primary source.

The Brahmaputra River originates from the Chemayungdung Glacier in the Kailash Mountain range of Tibet (China). It flows through Arunachal Pradesh and Assam before entering Bangladesh. Siachen Glacier feeds the Nubra River, while Yamunotri and Gangotri are sources of Yamuna and Ganga respectively.

Daman and Diu are separated by the Gulf of Khambat (also known as the Gulf of Cambay). Daman is on the mainland coast north of the gulf, while Diu is an island south of the gulf. The Narmada River, Gir Hills, and Tapti River do not form the boundary between these two union territories.

Operation Flood (1970-1996) was India's dairy development programme that transformed India from a milk-deficient nation to the world's largest milk producer. It was implemented by the National Dairy Development Board (NDDB) and led to the formation of AMUL and other dairy cooperatives. It had nothing to do with river linking or flood control.

The Indira Sagar Dam is a multipurpose project on the Narmada River in Madhya Pradesh. It is part of the Narmada Valley Project and is one of the largest reservoirs in India. The dam serves purposes of irrigation, hydroelectric power generation, and water supply.

The Ganges River is known as the Padma after it enters Bangladesh. The river splits distributaries, with the main flow becoming the Padma, which eventually joins the Jamuna River and then flows into the Bay of Bengal as the Meghna.

Wular Lake in Kashmir is India's largest freshwater lake by surface area. This geographic fact is well-documented and commonly tested in Indian geography.